ACKNOWLEDGEMENTS This research was supported by a grant from the Medical Research Council’s Public Health Intervention Development scheme. The research team would like to thank Christine Foster and the staff and volunteers of Healthy Valleys, Lanarkshire, for their support in carrying out this work, and Beverley Scheepers and Joanne Buchan of ASH Scotland for their assistance in developing training material. FUNDING Medical Research Council PHIND Grant MR/M026159/1.Peer reviewedPublisher PD